Since the beginning of this month (July 2020) we’ve seen a signficant uptick in the number of failures from the beacon for browser insights.This appears to mostly be IE 11. Has anyone else noticed this? I did see (via doing diffs in the wayback machine) some changes were applied to https://static.cloudflareinsights.com/beacon.min.js around June 23rd.
Uncaught SecurityError: Failed to execute ‘sendBeacon’ on ‘Navigator’: sendBeacon() with a Blob whose type is not any of the CORS-safelisted values for the Content-Type request header is disabled temporarily. See http://crbug.com/490015 for details.